Combined cornice-brake and sh eari ng- m ach i n e



(No Model.)

G. C. KEENE.

GOMBINED-GORNIGE BRAKE AND SHEARING MACHINE.

No. 374,306. Patented Dec. 6, 1887.

I l I 62/ a? I """w o I 3 O fi' g 0 a z w a 1| 'm w 1 J- g MU w r 3 l lATTEET INVENTUR UNITED STATES PATENT OFFICE.

GEORGE C. KEENE, OF CINCINNATI, OHIO.

COMBINED CORNlOE-BRAKE AND SH EARING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 374,306, dated December6, 1887.

Application filed September 17, 1887 To all whom it may concern.-

Be it known that I, GEORGE 0. KEENE, a citizen of the United States, anda resident of Cincinnati, in the county ofHamilton and State of Ohio,have invented certain new and useful Improvements in CombinedSquaring-Shears and Cornice-Brakes, of which the following is aspecification.

My invention relates to a combined squaringshear and cornice-brake, or,more particularly speaking, to asupplementai shear attachment for use inconnection with and upon the cornice-brakes patented by me July 1, 1884,No. 301,128, and May 10, 1887, No. 362,749; or, in fact, any of thewell-known cornice-brakes in general use, to square and trim the sheetsbefore bending into the desired shape,or otherwise.

My invention consists in the combination, w1th the stationary tie-beamand the movable platen forming partof the clamping apparatus in acornice-brake, of a horizontal bar or beam provided along its innerlower edge with a shear-blade and at its opposite ends with oblongopenings or slots, each adapted to acc'om- V modate an eccentric or cammounted upon a stud or bolt projecting outwardly from the opposite endsof said stationary tie-beam, ma nipulating handles or levers on saideccentrics, anda lower shear-blade along the upper outer edge of saidplaten, whereby sheets of metal may be squared or trimmed previous totheir being bent into shape for cornices and otherwise.

Other features of myinvention will be fully set forth in the followingdescription of the accompanying drawings, in which- Figure l is alongitudinal elevation of the back of one of my cornice-brakes, showingmy lmproved squaring-shear device attached in place thereon, the partsbeing shown ready to receive a sheet preparatory to clamping andshearing; Fig. 2, a vertical transverse section on line as at, Fig. 1,showing the movable clamping-platen, the stationary tie-beam verticallyabove it, and my improved squaringshear attachment applied thereto; Fig.3, a vertical transverse section on line y y, Fig. 1, (enlarged,)showing the eccentric or cam handle in elevation and broken off, and thelower part of said movable platen broken olf; Fig. 4, an elevationshowing one of the slotted ends of the shear'beam, the same being brokenoil; Fig. 5,a vertical side elevation of one of the handled eccentricsor cam-levers; and Fig. 6, an elevation of the lever shown in Fig. 5,showing the inner face thereof.

A A represent the supporting-frame legs of the machine; B,the horizontalmovable platen, forming partof the sheet clamping apparatus; C, thestationary tie-beam lying vertically above said platen, and D thebending apron or brake pivoting on its ends or axes din boxes I) on saidplaten. I

E E represent upright bars with their lower ends pivotally engaging thefoot-shaft F at the base of the machine, and their upper ends alsopivotally engaging the movable platen or table B,to form apart of andoperate the clamping mechanism, as in said former Letters Pat cnt.

G is a horizontal beam provided at its 0pposite ends with oblongopenings or slots g g, and along its inner lower edge with a shearblade,H, attached in any suitable manner.

I I representcam or eccentric levers with their cams or eccentricsproper,i,lying within and engaging the slots 9 g in shear-beam G andpivotally mounted on studs or bolts J ,projecting outwardly from theopposite ends of the stationary tie-beam C, as clearly shown in Figs. 1and 3.

K K are friction and spacing plates,sec'ured in place at the saidopposite ends of the tiebeam C by means of countersunk screws 0 c, topermit the adjacent moving parts to pass over without obstruction, andat the same time properly arrange the shear-beam G for operation inconnection with the lower shear-blade, L. Shear'blade L is mounted uponthe upper outer edge of movable platen B, and adjustably secured inplace by means of screws e,passed through countersunk slotsin theblade,and vertical set-screws f, passed through lugs f on the face of the saidplaten.

The operation of my improved squaringshear attachment is as follows: Theparts being open or at rest, as shown in Figs. 1, 2, and 3, a sheet isplaced between them up to the desired point, and then firmly clamped, asin said former Letters Patent. Then either camlever is drawn downlaterally, almost half a revolution, in the direction indicated by thearrows in Fig. 1, thereby lowering one-half, or

approximately so, of the shear-beam. Then the other cam-lever issimilarly operated to lower the balance of said shear-beam, the camstraveling in the slots at the ends of the shear beam to form both avertical and draw cut of the blade. The levers are then raised byreversing their direction of movement, or, in other words, movingbackward over the same path followed in their cutting operation, and theshear-beam placed in position ready for another out.

It is obvious that instead of duplicating the cam-levers and the slotsat both ends of the shear-beam, one camlever and slot at but one endthereof and an ordinary pivotal connection made of said beam at theother could be provided and the shearing operation accomplished; butsuch could not be done without a much greater movement of one end ofsaid beam, thereby necessitating a larger slot, a larger cam, and adeeper lower shear-blade.

I claim 1. A combined squaring-shear and cornicebrake composed of aplaten or table, B, a tie said parts being constructed, arranged, and Loperating substantially in the manner and for the purpose specified.

2. A shearing attachment composed of a movable shear-beam, G H, havingone or both its ends slotted, and cam lever or levers I I engaging saidslotted end or ends, in combination with studs J, shear-blade L, and thetie.- beam, bed, or platen of a cornice-brake or other similarmetal-working machine, the parts being arranged, mounted, and adapted tooperate substantially as described.

In testimony whereof I have hereunto set my hand this 30th day ofAugust, 1887.

GEORGE c. KEENE.

' Vitnesses:

JOHN E. JONES, JOHN ADAMS.

